1927 Mississippi Flooding This flood was the most destructive flood in the history of the United States.It was caused by heavy rain which fulfilled the river’s capacity. The river broke in 145 places, flooding 70,000km2, with depths of up to 30ft.The flood affected 10 states, 7 of which were affected by death. People met up to discuss different management strategies – a few weeks later 30 tons of dynamite was set off at a levee in Louisiana, relieving the river of 7,000 m³/s of water. Under the Flood Control Act of 1928, the world's longest system of levees was built. Floodways that diverted excessive flow from the Mississippi River were constructed.
http://en.wikipedia.org/wiki/File:1927_LA_Flood_Map.jpg A map showing the flooded areas due to the 1927 Mississippi flood.
https://gsa.confex.com/gsa/2002AM/finalprogram/abstract_44272.htm A description of the floods effects and the flood management strategy.
http://en.wikipedia.org/wiki/File:1927_flood_Caernarvon_levee_dynamite_St._Bernard_Parish.png A photo of the Louisiana dynamite explosion
http://coolgeography.co.uk/A-level/AQA/Year%2012/Rivers,%20Floods/Long%20profile/Hjulstrom.htm <I found this video useful when trying to understand the Hjulström curve for our poster.
This article highlights the reasons for the Mississippi flood such as the soil being saturated, which caused a high ammount of surface run off into the river and it's tributaries. It also shows the impact of the flood on its surroundings.
This article explains the reoccuring problems of flooding which York experiences. The article outlines the impacts that the flooding has caused, such as the bridge running over the River Wharfe being split into two in Tadcaster. It also includes the different stradgedies York uses to deal with their constant flooding, such as their lood defences.
ABSTRACT The Hull floods occurred in 2007. Hull flooded because the drainage system over flooded. Hull is a low lying city which means it doesn’t take long until the water table increases therefore its more prone to floods.
The article i have found talks about rivers and flooding. it focuses on how a stream profile, gradient, discharge and stream channel patterns. It also shows how the following affects a flood. Flooding Magnitude and Frequency Recurrence Upstream/Downstream Flooding Effects of Urbanization Flood control http://geology.isu.edu/wapi/envgeo/EG3_rivflood/eg3_rivers.htm Florence Goldring
The Great Ohio, Mississippi River Valley Flood of 1937 occurred because of a period of heavy rainfall and melting snow. This saw the Ohio and Mississippi rivers exceed record flood levels. The rain was due to irregular weather patterns. Frozen ground contributed to the runoff into the rivers. Rain was reported for 27 out of 31 days during January.
The 1993 Mississippi River flood was notable for its high magnitude, long duration, summer occurrence, and low sediment discharge. A field survey of a 70-km-long reach in the vicinity of Quincy, Illinois, revealed that the event was characterized by <4 mm of vertical accretion on leveed and unleveed parts of the flood plain. Regional patterns of overbank suspended sediment transport and deposition were discerned from Landsat Thematic Mapper imagery. This >100 yr flood had remarkably little sedimentological or geomorphological impact on the flood plain within the study reach because the transport effectiveness of floods in large drainage basins is influenced by event sequencing in the same manner as floods in small watersheds, and the cohesive flood-plain soils were not susceptible to erosion.
In July, nearly a month’s worth of rain fell in three hours in parts of West Yorkshire, causing mass flooding in towns Mytholmroyd and Hebden Bridge. The canal in Hebden Bridge burst its banks, flooding the town centre. Due to highly saturated soil in the hillside some houses were flooded due to increased surface run-off. More than 500 homes and businesses in Mytholmroyd, Hebden Bridge and Todmorden were flooded.
Hebden Bridge was flooded for the second time in three weeks. The local authorities are put under increasing presseure to improve flood defences as businesses and home owners are hit again soon after recovering from the last flood. The local government is in talks with insurers to make insurance cover more affordable.
1927 Mississippi Flooding
ReplyDeleteThis flood was the most destructive flood in the history of the United States.It was caused by heavy rain which fulfilled the river’s capacity. The river broke in 145 places, flooding 70,000km2, with depths of up to 30ft.The flood affected 10 states, 7 of which were affected by death.
People met up to discuss different management strategies – a few weeks later 30 tons of dynamite was set off at a levee in Louisiana, relieving the river of 7,000 m³/s of water. Under the Flood Control Act of 1928, the world's longest system of levees was built. Floodways that diverted excessive flow from the Mississippi River were constructed.
http://en.wikipedia.org/wiki/File:1927_LA_Flood_Map.jpg
A map showing the flooded areas due to the 1927 Mississippi flood.
https://gsa.confex.com/gsa/2002AM/finalprogram/abstract_44272.htm
A description of the floods effects and the flood management strategy.
http://en.wikipedia.org/wiki/File:1927_flood_Caernarvon_levee_dynamite_St._Bernard_Parish.png
A photo of the Louisiana dynamite explosion
Sadie:
ReplyDeletehttp://coolgeography.co.uk/A-level/AQA/Year%2012/Rivers,%20Floods/Long%20profile/Hjulstrom.htm <I found this video useful when trying to understand the Hjulström curve for our poster.
This article highlights the reasons for the Mississippi flood such as the soil being saturated, which caused a high ammount of surface run off into the river and it's tributaries. It also shows the impact of the flood on its surroundings.
http://www.engr.colostate.edu/~jsalas/us-italy/papers/12galloway.pdf
Shanley
ReplyDeletehttp://www.bbc.co.uk/news/uk-england-york-north-yorkshire-19732741
This article explains the reoccuring problems of flooding which York experiences.
The article outlines the impacts that the flooding has caused, such as the bridge running over the River Wharfe being split into two in Tadcaster.
It also includes the different stradgedies York uses to deal with their constant flooding, such as their lood defences.
http://www.coulthard.org.uk/downloads/floodsinhull1.pdf
ReplyDeleteABSTRACT The Hull floods occurred in 2007. Hull flooded because the drainage system over flooded. Hull is a low lying city which means it doesn’t take long until the water table increases therefore its more prone to floods.
The article i have found talks about rivers and flooding. it focuses on how a stream profile, gradient, discharge and stream channel patterns. It also shows how the following affects a flood.
ReplyDeleteFlooding
Magnitude and Frequency
Recurrence
Upstream/Downstream Flooding
Effects of Urbanization
Flood control
http://geology.isu.edu/wapi/envgeo/EG3_rivflood/eg3_rivers.htm
Florence Goldring
Ammen Arya
ReplyDeletehttp://hassam.hubpages.com/hub/Famous-Floods
http://coastguard.dodlive.mil/2011/06/the-great-ohio-mississippi-river-valley-flood-of-1937/
The Great Ohio, Mississippi River Valley Flood of 1937 occurred because of a period of heavy rainfall and melting snow. This saw the Ohio and Mississippi rivers exceed record flood levels. The rain was due to irregular weather patterns. Frozen ground contributed to the runoff into the rivers. Rain was reported for 27 out of 31 days during January.
The 1993 Mississippi River flood was notable for its high magnitude, long duration, summer occurrence, and low sediment discharge. A field survey of a 70-km-long reach in the vicinity of Quincy, Illinois, revealed that the event was characterized by <4 mm of vertical accretion on leveed and unleveed parts of the flood plain. Regional patterns of overbank suspended sediment transport and deposition were discerned from Landsat Thematic Mapper imagery. This >100 yr flood had remarkably little sedimentological or geomorphological impact on the flood plain within the study reach because the transport effectiveness of floods in large drainage basins is influenced by event sequencing in the same manner as floods in small watersheds, and the cohesive flood-plain soils were not susceptible to erosion.
ReplyDeleteRelating back to what we are doing now.
Alex
Sam Middleton
ReplyDeletehttp://www.bbc.co.uk/news/uk-england-leeds-18768291
In July, nearly a month’s worth of rain fell in three hours in parts of West Yorkshire, causing mass flooding in towns Mytholmroyd and Hebden Bridge. The canal in Hebden Bridge burst its banks, flooding the town centre. Due to highly saturated soil in the hillside some houses were flooded due to increased surface run-off. More than 500 homes and businesses in Mytholmroyd, Hebden Bridge and Todmorden were flooded.
http://www.hebdenbridgetimes.co.uk/news/local/end-this-hell-1-4722809
Hebden Bridge was flooded for the second time in three weeks. The local authorities are put under increasing presseure to improve flood defences as businesses and home owners are hit again soon after recovering from the last flood. The local government is in talks with insurers to make insurance cover more affordable.